import java.io.*; import java.util.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); long x = sc.nextLong(); HashMap counts = new HashMap<>(); for (long i = 2; i <= Math.sqrt(x); i++) { while (x % i == 0) { counts.put(i, counts.getOrDefault(i, 0) + 1); x /= i; } } if (x > 1) { counts.put(x, counts.getOrDefault(x, 0) + 1); } long ans = 1; for (long y : counts.keySet()) { if (counts.get(y) % 2 == 1) { ans *= y; } } System.out.println(ans); } } class Scanner { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(""); public Scanner() throws Exception { } public int nextInt() throws Exception { return Integer.parseInt(next()); } public long nextLong() throws Exception { return Long.parseLong(next()); } public double nextDouble() throws Exception { return Double.parseDouble(next()); } public String next() throws Exception { while (!st.hasMoreTokens()) { st = new StringTokenizer(br.readLine()); } return st.nextToken(); } }